Drill-twisting machine



R. HERVIG.

DRILL TWISTING MACHINE.

APPLICATION FILED JUNE 10. 1920.

Patented Feb. 7, 1922.

v 2 SHEETS-SHEET! 'Tflfi ATTORNEY R. HERVIG.

DRILL TWISTING MACHINE.

APPLICATION FILED JUNE WI 1920.

Patented Feb. 7 1922.

2 SHEETS-SHEET Z- A TTOR/VEYS UNI'TEDfSTATES:

OFF-ICE? ti RICHARD HERVIG, or onioeeo, ILLINOIS, Assniivron T m agement noun- DRY COMPANY, or'nnw YORK, n.1, .A CORPORATION OFNEW JERSEY. q j

To all whom kit-may 00mm v siding at Chicago, county of CoQk, State of occur to persons skilled inth'e art. Q

r the left inFig; '1;

Illinois, and being a citizen of the United 7 States, have invented certain new and useful Improvements in Drilllfwisting"Machines, of which the following, is a .full, clear, and exact description, such as will enable others skilled in the'art to which it appertains to 'make and to use the same, reference being had to the accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited-to the exact details of construction shown and described, as it is obvious that various modifications thereof within the scope ofthe claims. will In said drawings: i Figure 1 is a view-partlys-in 'elevation'and partly in section of my improvedmachi-ne; v v

i 21 and 22 are-connected by the'l nk 23 which Figure 2 is an end elevation, looking from Figure 3 is a section "through the sleeve carriage and sleeve, show ng a-tw sted blank in position in the sleeve; 1

Figure 4 1s a view 1n plan of a loose 001- lar or sleeve used ino determining the det gree of twist given the blank; H

Figure 5 is a sectional view takenlon the line 5+5 of Fig.- 1 showing the blank pos1- tioned with respect to the adjustable holding means in thesleeve; and] J ,Figure 6is a'view' showing theuse of a plurality of the sleeves shown in Fig. 4

where it is-desired to give a greater amount of twist to a blankor to tw'ista 1onger blank.

It is the object of my invention to provideo an improved-machine for twisting drill blanks of, such structure that it may be quickly adjusted to'give the-.desired degree oftwi'st to a blank or to operate upon blanks of different lengths; J

The machine comprises a bed or base, plate 1 carried upon a suitable support 2. At one end, the base plate 1 is provided with intel ral uprights or standards 3" and 4 "that V carry an integral split headjohaving the lugs 6 in which are the screws7. The base plate 1 also has a raised flatjportion 8 provided with under-cut guides 9 and" 10 (shown dotted in Fig. 2) engagediby the base ofthe sleeve carriage'll, Secured to Application filed June 10, 1920.';';Seria1 No;3 88, 050.

on-movement ofthe sleeve 27.

nmLL-TwisTme MACHINE."

one side of the jbaseplate 1,by screwsj'12,

is a rack bar 13, while to the other sideof s i ep m 're' Patented F eb;"7,1922; l a

the base plate 1 the ratchet bar -ll is secured by screws'15. Engaging'with'the rackbar l3 and servingto operate thesleevec'arriage 11 on tsgu des 1s a gearwheel :16 operated by a hand wheell'? and carried'by a pivot pin fixedhin a projection 18 integral with e thelsleeve carriage 11. Mounted upon pins 19 and 20,,screwed into lugs upon the .opposite side of the sleeve carriage, are. the pawls 21 and 22, adapted to engage the ratchet bar 14, the pawls21 and 22 being so spaced with respect" to the. teethv on the ratchet bar 11 that'when one pawl is an gaged with a ratchet tooth the ot er pawl rests upon ;the inclined face-of a ratchet tooth, midway of its length, thus making-it possible to givethe sleeve carriage positions differing by only one half the'length-ofa ratchettooth". The upper endsv of the pawls pivotally connected to each; pawl, 'a's'by pin24. Perpendicular tothe link 23, at its center is a taperedmelnber 2 5 -having;a'

spherical end piece 26'which serves as a convenient handle to begrasped by the operator when it'is desired to operatethe pawl and asla weight for holding the pawls in engagement with the ratchet bar orout of engagement therewlth.

Insertedin a longitudinal ini-the sleeve jcarriage 11 is vthe blank carrying v 4 sleeve 27 having a central bore closed atl one' end by ascrew threaded plug 28 and screws 29 which project into the bores from opposite sides of the sleeve 27 and serve to prevent rotation of the-blank 30 in: the sleeve 1;; j

' .27. I The sleeve 27 a is also provided with an integral collar 31 whichserves to vposition the sleeve carriage 11 engages in a notch 35 in the sleeve 27f and prevents the withdrawal In the head 5 is mounted .a spindlefiib I provided with a central longitudinal bore and having a chuck 37 secured to its inner end to serve asa driving-means for the blanks and a collar 48 fitted in the bore to carry the end of the blank. A collar 38, integral with the spindle 36, engages the face of the head 5 and positions the spindle in the head while fitted in the bore in the spindle 36 is an ejector rod 39 adapted to slide in the bore and to engage the end of the blank to aid in freeing the blank. Mounted upon the spindle 36 so as to turn freely thereon is a collar 40 having a projection 41 adapted to engage a pin 42 in jection 41 on the adjacent collar 40. Screwed on the spindle 36 and held in position by set screws 46 are the locking collar 47 and cap 49 that serve to keep the crank 44 and loose collars 40 close together so that the pin-42 and the various projections 41 on the'collars 40 will be engaged. This arrangement, when the handle has been turned toits limit, permits the handle to have a predetermined movement before it engages the projection 41 on the adjacent collar 40. The collar will then move with the handle until, in case'but one collar is used, the projection41 engages the pin 42. Where more than one collar is used, the projections 41' are successively engaged and the corresponding collars moved with the handle until the projection 41 on the collar adjacent the head 5 engages the pin 42. The number of collars 40 and the position of the pin 42 in'the series of openings 43 determines the extent of-the movement of the handle. As this operation takes place irrespective ofthe direction in which the handle 44 is turned, the handle and spindle are turned through a definite are each time the handle is operated between its extreme positions and this amount may be varied to suit'the requirements in the case of any particular blank by changing pin 42 from one opening 43 to another and by varying the number of the collars 40 on the spindle 36.

In operation, the pawls are operated by the handle 26' permitting the sleeve carriage 11 and the sleeve 27 to be drawn away from the chuck 37 by the operation of the hand wheel 17 so that a'blank 30 maybe inserted in the sleeve. The blank, properly heated, being inserted in the sleeve 27 with the endof the blank between the screws 29 and bearing against the plug 28, the hand wheel 17 is operated to bring the sleeve -a sleeve carriage adjustable. on said base plate, a blank carrying sleeve carried by said carriage, means carried by said sleeve to hold the blank against rotation, aheadcarried by said base plate, a spindle in said head, means for rotating said spindle in said head and adjustable means on'saidhead and co-oper ating means on said spindle for determining the degree of rotation of said spindle." V

2. In a drill twisting'machine, abas'e plate, a sleeve carriage adjustable on said base plate, a blank-carrying sleeve carried bysaid carriage, a head carried by said base plate,- a

spindle carried by said head, a'pin carried by said base plate, a collarfon said spindle adapted to engage" said pin and means to rotate saidspindle adapted to engage said collar.

3. In a drill twisting machine, a base plate, a

a sleeve carriage adjustable on said base plate, a blank carrying sleeve mounted in said, sleeve carriage and adapted to hold a blank against rotation with respect to said sleeve carriage, a head' carried by said base plate, a spindle in said head adapted to rotate a blank with respect to said sleeve carriage, means for rotating said'spindle and adjustable means on said head-for limiting the amount oif-such rotation. V

4. In a drill twisting machine, a base plate, a sleeve carriage adjustable on said base plate, a blank carrying sleeve'mounted in said sleeve carriage and held against rotation therein, a head mounted on said base plate, a spindle in said head adaptedto co-operate with said'sleeve' in twisting a blank, a pin adjustably positioned in said head, a collar rotatable onsaid spindle and adapted to engage said-pin and a' crankhandle mounted on said spindle and adapted to engage said collar and limited in its movement: by -the engagement ofsaid handle, saidcollar and said pm.

5. In a drill twisting machine,'a base plate,

means carried by said base plate adapted to hold a blank against rotation, a head carried by said baseplate, a spindle mounted in said head and adapted to rotate the blanks, a pin adjustably mounted in said head, a collar loosely mounted on said spindle and adapted to engage said pin, a crank handle keyed to said spindle, adapted to engage said collar and limited in its movement in both directions by the engagement of said handle,

said collar and said pin. a

6. In a drill twisting machine, a base plate,

means adjustable on said base plate adapted, to hold a blank against rotation, means for ad usting said blank holding means on said base plate, means for securing said blank holding means agalnst movement in one direction While 'permltting movement in the opposite direction and means carried bysaid base plate for rotating the blank.

7. In a drill twistingmach'ine, a base plate, means adjustable on said base plate adapted to hold a blank against rotation, gearing carried by .said means and said base plate for. adjusting said means on sa d base'plate, a

8. In a drilltwisting machine, a base plate,

means carried by said base plateadapted to hold a blank against rotation, a head carried by said base plate, a hollow spindle mounted in said head and adapted to rotate the blank,

operating means for said spindle, means carried by said operating means, said spindle and said head for limiting the movement of said spindle and an ejector rod for the blank mounted in said spindle.

9. In a drill twisting machine, a base late a sleeve carria e' holdn meansfor 7 V :3 7 b said carriage adapted to permit movement of said carriage in-one direction, a blank carrying sleeve carried by said carriage, a 1

head carried by said base plate, a spindle in said head adapted to rotate the blank, means for rotating the spindle and adjustable of said spindle in both directions.

40 means on said head for limiting the rotation V 10. 11; a drilltwisting machine, that plate, a sleeve carriage freely movable in one dlrectlon on said base plate, a blank carrying sleeve mounted on said carriage,

means carried'by said sleeve to prevent rotation of the blank, a-head carried by said base plate, means carried by said head adapted to rotate said blank and adjustable means carried by said head and adapted to limitthe rotation of the blank.

In Witness whereof I have hereunto set' my, hand in vthe presence of two itnesses.

' fRICHARD HERVIG.

Witnesses:

R. SMITH, JOSEPHINE MITC ELL. 

